我有一个带有这些参数的 SQL 过程
@WorkflowApprovalHistoryId int OUTPUT,
@ProjectUid uniqueidentifier,
@ProjectId nvarchar(50),
@StageUid uniqueidentifier,
@Username nvarchar(50),
@WasRejected bit,
@Cost money,
@Work money,
@StartDate datetime,
@FinishDate datetime,
@InsertDate datetime OUTPUT
我已经检查了这个Failed To Convert Parameter Value From A String To A Int32，但它对我没有帮助，因为我没有任何输入参数作为 int。
我在这里粘贴我的代码
private void LogApproval(Guid prjUId, bool wasRejected) {
string projectId = string.Empty;
Nullable<Guid> stageUid = null;
Nullable<decimal> cost = null;
Nullable<decimal> work = null;
Nullable<DateTime> startDate = null;
Nullable<DateTime> finishDate = null;
string stageGuid = string.Empty;
//Processing here
SqlConnection conn = null;
conn = new SqlConnection(getConnectionString());
conn.Open();
SqlCommand cmnd=new SqlCommand();
cmnd.CommandText="ProcedureName";
cmnd.CommandType=CommandType.StoredProcedure;
cmnd.Connection=conn;
SqlParameter param1=new SqlParameter();
param1=cmnd.Parameters.Add("@WorkflowApprovalHistoryId",SqlDbType.Int);
param1.Direction=ParameterDirection.ReturnValue;
SqlParameter param2=new SqlParameter();
param2=cmnd.Parameters.Add("@ProjectUid",SqlDbType.UniqueIdentifier);//sharepoint
param2.Direction=ParameterDirection.Input;
param2.Value = System.Data.SqlTypes.SqlGuid.Parse(prjUId.ToString());
//param2.Value=prjUId;
SqlParameter param3=new SqlParameter();
param3=cmnd.Parameters.Add("@ProjectId",SqlDbType.NVarChar);
param3.Direction=ParameterDirection.Input;
param3.Value=projectId;
SqlParameter param4=new SqlParameter();
param4=cmnd.Parameters.Add("@StageUid",SqlDbType.UniqueIdentifier);// PSI
param4.Direction=ParameterDirection.Input;
param4.Value = System.Data.SqlTypes.SqlGuid.Parse(stageUid.ToString());
//param4.Value=stageUid;
SqlParameter param5=new SqlParameter();
param5=cmnd.Parameters.Add("@Username",SqlDbType.NVarChar); //unidentified
param5.Direction=ParameterDirection.Input;
param1.Value="userName";
SqlParameter param6=new SqlParameter();
param6=cmnd.Parameters.Add("@WasRejected",SqlDbType.Bit);//form status provide as input
param6.Direction=ParameterDirection.Input;
if (wasRejected == true)
param6.Value = 1;
else
param6.Value = 0;
SqlParameter param7=new SqlParameter();
param7=cmnd.Parameters.Add("@Cost",SqlDbType.Money); //PSI
param7.Direction=ParameterDirection.Input;
param7.Value=cost;
SqlParameter param8=new SqlParameter();
param8=cmnd.Parameters.Add("@Work",SqlDbType.Money);//PSI
param8.Direction=ParameterDirection.Input;
param8.Value=work;
SqlParameter param9=new SqlParameter();
param9=cmnd.Parameters.Add("@StartDate",SqlDbType.DateTime);// PSI
param9.Direction=ParameterDirection.Input;
param9.Value=startDate;
SqlParameter param10=new SqlParameter();
param10=cmnd.Parameters.Add("@FinishDate",SqlDbType.DateTime);// PSI
param10.Direction=ParameterDirection.Input;
param10.Value=finishDate;
SqlParameter param11=new SqlParameter();
param11=cmnd.Parameters.Add("@InsertDate",SqlDbType.DateTime);
param11.Direction = ParameterDirection.ReturnValue;
cmnd.ExecuteNonQuery();
var HistoryID = param1.Value;
var InsertDate = param11.Value;
}
在执行 Execute NonQuery 时抛出 Failed to convert parameter value from a String to a Int32